JPS62151459A - Polyetyerimide resin composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition improved in impact strength with heat resistance, rigidity, etc. retained, suitable for electric parts, etc., by incorporating a polyetherimide with an ethylele copolymer from ethylene, alpha,beta-unsaturated carboxylic acid alkyl ester, etc. in specified amount. CONSTITUTION:The objective composition can be obtained by incorporating (A) 70-99wt% of a polyetherimide of formula (R is 6-30C-divalent aromatic organic group; R' is R, 2-20C alkylene, etc.) with (B) 30-1wt% of an ethylene copolymer from B1: 50-90(pref. 60-85)wt% of ethylene, B2: 5-49(pref. 7-45)wt% of an alphabeta-unsaturated carboxylic acid alkyl ester (e.g. ethyl acrylate) and B3: 0.5-10(pref. 1-8)wt% of maleic anhydride.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a polyetherimide resin composition with improved impact strength.

<Conventional technology> Polyetherimide resin has heat resistance, flame retardancy, chemical resistance,
It is attracting attention as an engineering plastic with excellent rigidity, especially for applications such as electrical parts and automobile parts.

However, this resin has drawbacks such as poor ductility and brittleness. It is known that brittleness can be improved to some extent by adding a fibrous reinforcing material such as glass fiber to the resin.

However, the improvement is not sufficient even with the addition of the fibrous reinforcing material, and there is a strong demand in various application fields to maintain characteristics such as heat resistance, flame retardance, and rigidity, and to improve brittleness. There is.

<Problem that the invention seeks to solve> The present invention relates to the heat resistance of polyetherimide resin.

The object of the present invention is to provide a composition that improves fragility without reducing excellent properties such as rigidity.

Means for Solving the Problems> In view of the above circumstances, the inventors of the present invention have made extensive studies and found that ethylene consisting of ethylene, α, β-unsaturated carboxylic acid alkyl ester, and maleic anhydride is added to polyetherimide resin. The inventors have discovered that by blending a copolymer, it is possible to maintain the above-mentioned properties of polyetherimide resin and obtain a composition having excellent impact properties, and have arrived at the present invention.

That is, the present invention comprises human polyetherimide 70-99% by weight, (B) ethylene 50-90% by weight, a
, 30-1ikfflt% ethylene copolymer consisting of 49% β-unsaturated carboxylic acid alkyl ester
A polyetherimide resin composition comprising:

The polyetherimide used in the present invention has the general formula (where,
R is a divalent aromatic organic group having 6 to 30 carbon atoms; R/ is a chain consisting of an R group, an alkylene group having 2 to 20 carbon atoms, a cycloalkylene group, and an alkylene group having 02 to 8 carbon atoms; It is a divalent organic group selected from terminated polydiorganosiloxane groups. ) is a polymer represented by

Here, R is for example Examples include.

A particularly typical polyetherimide is a polymer having the general formula, which is commonly sold by General Electric Company of the United States under the trademark "ULTEM". The manufacturing method is disclosed in Japanese Patent Publication No. 57-9372.

The monomer components of the ethylene copolymer used in the present invention are ethylene, α,β-unsaturated carboxylic acid alkyl ester, and maleic anhydride, and ethylene is
0 to 90% by weight, preferably 60 to 85% by weight, α, β
-5 to 49% by weight of unsaturated carboxylic acid alkyl ester
, preferably 7 to 45% by weight, and maleic anhydride 0.5 to 10% by weight, preferably 1 to 8% by weight.

The α,β-unsaturated carboxylic acid alkyl ester is an unsaturated carboxylic acid having 3 to 8 carbon atoms, such as acrylic acid,
Alkyl esters such as methacrylic acid, specific examples include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, and methacrylate. Methyl acid, ethyl methacrylate,
n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, [-butyl methacrylate,
and isobutyl methacrylate, among which ethyl acrylate, +1-butyl acrylate, and methyl methacrylate are particularly preferred.

The amount of these ethylene copolymers to be blended into polyetherimide is 70 to 99% by weight of polyetherimide and 30 to 1% of ethylene copolymer based on the total amount of polyetherimide and ethylene copolymer. Suitable, polyetherimide exceeds 99-fold regular form, and ethylene copolymer exceeds 1-fold polyetherimide.
If the amount is less than 30% by weight, the desired effect of improving the brittleness is insufficient, and if the amount of polyetherimide is less than 70% by weight and the amount of ethylene copolymer exceeds 30% by weight,
It is not preferable because the heat resistance and rigidity, which are characteristics of polyetherimide, are significantly reduced.

The means of blending the composition of the present invention is not particularly limited. It is possible to feed polyetherimide and ethylene copolymer separately to a melt mixer, or to mix these raw materials in advance using a mortar, Henschel mixer, ball mill, ribbon blender, etc. and then melt them. It can also be fed to a mixer.

1. For the composition of the present invention, antioxidants, heat stabilizers, ultraviolet absorbers, lubricants, mold release agents, colorants such as dyes and pigments, flame retardants, One or more conventional additives such as flame retardant aids and antistatic agents can be added.

Additionally, small amounts of other thermoplastic resins (e.g. polyethylene,
polypropylene, polyamide, polycarbonate, polyarylene ester, polysulfone, polyethersulfone, modified polyphenylene oxide, etc.), thermosetting resin (e.g. phenol resin, epoxy resin, etc.)
More than one species can be added.

In addition, reinforcing agents such as glass fiber, carbon fiber, boron fiber, silicon carbide fiber, asbestos fiber, metal fiber,
It is also possible to blend fillers such as clay, mineral, silica, graphite, glass beads, aluminum, carbon, calcium, and the like.

In particular, filling glass fibers or carbon fibers has a remarkable effect of improving rigidity and heat resistance, so that a more useful composition can be provided.

It is preferable to fill the total composition in an amount of 10 to 60 wt%. The fibers are chopped strands made of hundreds to thousands of single fibers with a diameter of 5 to 15 μm and a length of 3 to 8 μm, chopped fibers, or rovings that are long fibers. Fiber length is 0.15-0.
It is preferable to uniformly disperse the particles within a range of five attacks.

The present invention will be described below with reference to Examples, but these are merely illustrative and the present invention is not limited thereto.

Examples 1 to 3 Polynyderimide (manufactured by General Electric Company @
ULTEM' 1000) and 67% ethylene.

Ethyl acrylate 30.596 and maleic anhydride 2
．． Ethylene copolymers consisting of 5% were mixed in the composition shown in Table 1, melted and kneaded at a temperature of 330°C using a twin screw extruder (PCM-30 manufactured by Ikegai Iron Works), and then the strands were water-cooled and cut. to obtain pellets.

The obtained pellets were injection molded using a Nestal 47/28 injection molding machine with a cylinder temperature of 340°C.
1 (mold temperature: 130° C.), an Izotsu impact test piece, 1 bending test piece, and a test piece for measuring heat distortion temperature were obtained.

ASTM D-256, D-790, D-648 respectively
Measured according to Excellent values were obtained in both cases.

Comparative Examples 1-2 The polyetherimide and ethylene copolymer used in Examples 1-3 were mixed in the proportions shown in Table 1, processed in the same manner as in Examples 1-3, and measured for physical properties.

Table 1 Examples 4-5 Polyetherimide (manufactured by General Electric Company)
ULTEM"1000), ethylene 75.596, ethyl acrylate 22.5% and maleic anhydride 2.0%
An ethylene copolymer consisting of ethylene copolymer and glass fiber (C8O3-MA497 manufactured by Asahi Fiberglass Co., Ltd., chopped strand with a length of 3 ms) were mixed in the composition shown in Table 2,
With a twin screw extruder (PCM-30 manufactured by Ikegai Iron Works), 340
After melt-kneading at a temperature of C, the strands were water-cooled and cut to obtain pellets.

The obtained pellets were injection molded using a Nestal 47/28 injection molding machine with a cylinder temperature of 350°C.
1 (mold temperature: 130°C), an Izotsu impact test piece, 1 bending test piece, and a test piece for measuring combustion deformation temperature were obtained. Each AST
MD-256, D-790.

Measured according to D-648.

Comparative Example 3 The polyetherimide and glass fiber used in Examples 4 and 5 were mixed in the proportions shown in Table 2, processed in the same manner as in Examples 4 and 5, and measured for physical properties.

(Note: PEI is polyetherimide. %E is ethylene copolymer.) <Effects of the invention> The polyetherimide resin of the present invention contains ethylene, α, β.
- A composition containing an ethylene copolymer consisting of an unsaturated carboxylic acid alkyl ester and maleic anhydride can be used without reducing the heat resistance and rigidity of the polyetherimide resin.
The fragility has been significantly improved.

Procedural amendment + '7 (Voluntary) April 1986 I ke I'' Patent Office and 'rK\'A' ゎ , I3 呵\1, Indication of the case 1985 Patent application No. 294582 2 Name of invention poly Relationship with the etherimide tree ear composition case Patent applicant
Address 5-15 Kitahama, Higashi-ku, Osaka Name (20
9) Sumitomo Chemical Co., Ltd. Representative Mori
Hero 4, Agent Address: Sumitomo Chemical Co., Ltd., 5-15 Kitahama, Higashi-ku, Osaka Name: Patent Attorney (8597) Morohikari Instruments +06) 220-3404 5. Explanation" column 06, Contents of amendment 1) In the 9th page, line 11 of the specification, "Shi O" is corrected to "Shi 0 (results are shown in Table 1)."

2) On page 9, line 11 of the specification, the phrase ``Kr d O'' was corrected to ``It was significantly inferior to the Example (results are shown in Table 1).''

3) On page 10, line 17 of the specification, replace “shita 0” with “
(Results are shown in Table 2) High values were obtained in all cases. O) shown in Table 2.

Claims (1)

[Scope of Claims] (A) 70 to 99% by weight of polyetherimide and (B
) Ethylene copolymer 30 to 90% by weight of ethylene, 5 to 49% by weight of α,β-unsaturated carboxylic acid alkyl ester, and 0.5 to 10% by weight of maleic anhydride
1% by weight of a resin composition.